Head to Head
| Japonia - NPB | 2021/03/30 09:30 | Seibu Lions v Nippon Ham Fighters | W | 11-4 |
| Japonia - NPB - Amical | 2021/03/04 09:00 | Seibu Lions v Nippon Ham Fighters | W | 6-1 |
| Japonia - NPB - Amical | 2021/03/03 09:00 | Seibu Lions v Nippon Ham Fighters | L | 0-7 |
| Japonia - NPB | 2020/11/04 09:00 | Nippon Ham Fighters v Seibu Lions | W | 3-10 |
| Japonia - NPB | 2020/11/03 05:00 | Nippon Ham Fighters v Seibu Lions | W | 4-5 |
| Japonia - NPB | 2020/11/02 09:00 | Nippon Ham Fighters v Seibu Lions | W | 0-4 |
| Japonia - NPB | 2020/10/15 09:00 | Seibu Lions v Nippon Ham Fighters | L | 3-8 |
| Japonia - NPB | 2020/10/14 09:00 | Seibu Lions v Nippon Ham Fighters | L | 2-7 |
Home History
| Japonia - NPB | 2021/03/30 09:30 | Seibu Lions v Nippon Ham Fighters | W | 11-4 |
| Japonia - NPB | 2021/03/28 04:00 | Orix Buffaloes v Seibu Lions | W | 1-5 |
| Japonia - NPB | 2021/03/27 05:00 | Orix Buffaloes v Seibu Lions | L | 3-2 |
| Japonia - NPB | 2021/03/26 08:45 | Orix Buffaloes v Seibu Lions | W | 3-4 |
| Japonia - NPB - Amical | 2021/03/21 04:00 | Yakult Swallows v Seibu Lions | W | 6-8 |
| Japonia - NPB - Amical | 2021/03/20 04:00 | Yakult Swallows v Seibu Lions | W | 1-2 |
| Japonia - NPB - Amical | 2021/03/19 04:00 | Yokohama Bay Stars v Seibu Lions | L | 5-1 |
| Japonia - NPB - Amical | 2021/03/17 04:00 | Hanshin Tigers v Seibu Lions | L | 5-3 |
Away History
| Japonia - NPB | 2021/03/30 09:30 | Seibu Lions v Nippon Ham Fighters | L | 11-4 |
| Japonia - NPB | 2021/03/28 04:00 | Nippon Ham Fighters v Rakuten Eagles | L | 0-5 |
| Japonia - NPB | 2021/03/27 05:00 | Nippon Ham Fighters v Rakuten Eagles | W | 9-4 |
| Japonia - NPB | 2021/03/26 07:00 | Nippon Ham Fighters v Rakuten Eagles | L | 2-8 |
| Japonia - NPB - Amical | 2021/03/21 04:00 | Nippon Ham Fighters v Chunichi Dragons | L | 2-9 |
| Japonia - NPB - Amical | 2021/03/20 05:00 | Nippon Ham Fighters v Chunichi Dragons | W | 11-0 |
| Japonia - NPB - Amical | 2021/03/19 08:00 | Nippon Ham Fighters v Chunichi Dragons | L | 1-2 |
| Japonia - NPB - Amical | 2021/03/17 09:00 | Lotte Marines v Nippon Ham Fighters | L | 4-3 |